The Mauritanian capital, founded in the 3rd century B.C., became an important outpost of the Roman Empire and was graced with many fine buildings.是什么意思_The Mauritanian capital, founded in the 3rd century B.C., became an important outpost of the Roman Empire and was graced with many fine buildings.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句